Question
The expansion of (3a - 4b - 2c)²
is:Solution
ATQ, Expand (3a - 4b - 2c)²  using the formula: 
On Squaring each term: (3a)2 = 9a2, (− 4b)2 =16b2,  (−2c)2 = 4c2 Multiply pairs of terms: 2(3a) (−4b) = −24ab, 2(3a) (−2c) = −12ac, 2(−4b) (−2c) = 16bc On Combining everything, we get 9a ²  + 16b²  + 4c²  – 24ab – 12ac + 16bc
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